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In our September 2017 case report,1 we described a patient with progressive infantile idiopathic scoliosis (IIS) managed with osteopathic manipulative treatment. The possibility of spontaneous resolution of the patient's scoliosis curve was explained and accepted as the null hypothesis. Yes, the majority of IIS cases resolve spontaneously,2,3 and the majority of IIS cases are nonprogressive.4 As specified, the patient in the case report had progressive IIS, which made spontaneous resolution less likely.

We agree that the angles should have been labeled using the Cobb angle and not rib vertical angle difference. At the time the literature search was performed for this article, the Scoliosis Research Society used rib vertical angle difference, which is why it is mentioned as a common unit of reporting. Osteopathic physicians and surgeons indeed more commonly use the Cobb angle, and it would have been helpful if these data had also been included.